tidb修改互信后报错处理ssh: unable to authenticate, attempted methods [none publickey], no supported methods r

修改.ssh互信后，集群不能正常stop和start 报错ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain。

这时候需要更新ssh信息让tiup知道，更新信息时候卡住了。

[tidb@db1 ~]$ tiup cluster reload --ssh system tidb-test 
Starting component `cluster`: /home/tidb/.tiup/components/cluster/v1.7.0/tiup-cluster reload --ssh system tidb-test
Will reload the cluster tidb-test with restart policy is true, nodes: , roles: .
Do you want to continue? [y/N]:(default=N) y
+ [ Serial ] - SSHKeySet: privateKey=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/ssh/id_rsa, publicKey=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/ssh/id_rsa.pub
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.12
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.6
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.6
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.12
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.12
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.6
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.3
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.6
+ [Parallel] - UserSSH: user=tidb, host=10.0.4.6
+ [ Serial ] - UpdateTopology: cluster=tidb-test
+ Refresh instance configs
  - Regenerate config pd -> 10.0.4.3:2379 ... ⠙ InitConfig: cluster=tidb-test, user=tidb, host=10.0.4.3, path=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/config-cache...
  - Regenerate config pd -> 10.0.4.12:2379 ... ⠙ InitConfig: cluster=tidb-test, user=tidb, host=10.0.4.12, path=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/config-cac...
  - Regenerate config pd -> 10.0.4.6:2379 ... ⠙ InitConfig: cluster=tidb-test, user=tidb, host=10.0.4.6, path=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/config-cache...
  - Regenerate config tikv -> 10.0.4.3:20160 ... ⠙ InitConfig: cluster=tidb-test, user=tidb, host=10.0.4.3, path=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/config-ca...
  - Regenerate config tikv -> 10.0.4.12:20160 ... ⠙ InitConfig: cluster=tidb-test, user=tidb, host=10.0.4.12, path=/home/tidb/.tiup/storage/cluster/clusters/tidb-test/config-...
  - Regenerate config tikv -> 10.0.4.6:20160 ... ⠙ 
  - Regenerate config tidb -> 10.0.4.3:4000 ... ⠙ 
  - Regenerate config tidb -> 10.0.4.12:4000 ... ⠙ 
  - Regenerate config tidb -> 10.0.4.6:4000 ... ⠙ 
  - Regenerate config tiflash -> 10.0.4.3:9000 ... ⠙ 
  - Regenerate config cdc -> 10.0.4.3:8300 ... ⠙ 
  - Regenerate config prometheus -> 10.0.4.3:9090 ... ⠙ 
  - Regenerate config prometheus -> 10.0.4.6:9091 ... ⠙ 
  - Regenerate config grafana -> 10.0.4.3:3000 ... ⠙ 
  - Regenerate config alertmanager -> 10.0.4.3:9093 ... ⠙ 
  - Regenerate config alertmanager -> 10.0.4.6:9098 ... ⠙ 

解决办法：

su - tidb
cd .ssh 

cp  id_rsa /home/tidb/.tiup/storage/cluster/clusters/tidb-test/ssh/id_rsa
cp  authorized_keys    /home/tidb/.tiup/storage/cluster/clusters/tidb-test/ssh/id_rsa.pub

执行reload --ssh system 问题解决
tiup cluster reload --ssh system tidb-test